JP2016086508A

JP2016086508A - Armature core and method of manufacturing armature core

Info

Publication number: JP2016086508A
Application number: JP2014217119A
Authority: JP
Inventors: 裕介蓮尾; Yusuke Hasuo
Original assignee: Mitsui High Tec Inc
Current assignee: Mitsui High Tec Inc
Priority date: 2014-10-24
Filing date: 2014-10-24
Publication date: 2016-05-19

Abstract

PROBLEM TO BE SOLVED: To provide an armature core 1 constituted by laminating core pieces 2, 2', that can be constituted so that the lamination height of a specific part is different from that of other parts.SOLUTION: A stator core 1 constituted by laminating a plurality core pieces 2, 2' includes a central part 5 formed by laminating the core pieces 2 having a shape for forming a plurality of parts, and an upper end 6 and a lower end 7 formed by laminating the core pieces 2' coming into contact with the central part 5, and having a shape lacking a part of the shape formed by the core pieces 2 constituting the central part 5.SELECTED DRAWING: Figure 2

Description

本発明は、複数の鉄心片を積層してなる電機子鉄心及び電機子鉄心の製造方法に関する。 The present invention relates to an armature core formed by laminating a plurality of core pieces and a method for manufacturing the armature core.

電動機や発電機の固定子や回転子を総称して電機子と呼ぶ。電機子は、電機子鉄心に、巻線を巻装して構成される。電機子鉄心は複数の部位からなる。例えば特許文献１に開示された電機子鉄心は、巻線が巻装される複数のティース部と、ティース部の背後にあって、複数のティース部を互いに連結するヨーク部とからなる。また、この電機子鉄心は、複数の鉄心片を積層して構成されていて、鉄心片は全て同一の形状を備えている。つまり、全ての鉄心片は、ヨーク部とティース部の両方を形成する形状を備えている。このように、従来の電機子鉄心は、同一の形状を備える鉄心片を積層して構成されているので、ティース部とヨーク部の積層高さは同一である。 The stator or rotor of an electric motor or generator is generically called an armature. The armature is configured by winding a winding around an armature core. The armature core consists of a plurality of parts. For example, the armature core disclosed in Patent Document 1 includes a plurality of teeth portions around which windings are wound, and a yoke portion that is behind the teeth portions and connects the plurality of teeth portions to each other. Moreover, this armature core is comprised by laminating | stacking several iron core pieces, and all the iron core pieces are provided with the same shape. That is, all the iron core pieces have a shape that forms both the yoke part and the tooth part. Thus, since the conventional armature core is configured by stacking the core pieces having the same shape, the stacked heights of the teeth portion and the yoke portion are the same.

特開昭６１−２９３１３６号公報Japanese Patent Laid-Open No. 61-293136

電動機や発電機は、効率の最大化、出力の最大化、寸法の最小化等を目標にして設計されるが、これらの設計目標はトレードオフの関係にあって、複数の設計目標の調和を図るような設計がなされる。また、設計目標を達成するためには、ティース部及びヨーク部における磁気飽和の緩和、つまりティース部とヨーク部の断面積の最大化、あるいは巻線の占積率の最大化が要求されるが、これらもトレードオフの関係にある。したがって、電動機や発電機の設計にあたっては、ティース部とヨーク部の断面積及び巻線の占積率の組み合わせが最適になるように、電機子の形状を最適化する必要がある。しかしながら、従来の電機子鉄心では、ティース部とヨーク部の積層高さが同一のものに限定されるので、設計の自由度が低いという問題がある。そのため、ティース部とヨーク部の断面積及び巻線の占積率の組み合わせを最適化することが難しいという問題がある。 Electric motors and generators are designed with the goal of maximizing efficiency, maximizing output, minimizing dimensions, etc., but these design goals are in a trade-off relationship, and multiple design goals must be harmonized. It is designed to be designed. In order to achieve the design goal, it is required to reduce the magnetic saturation in the teeth part and the yoke part, that is, to maximize the cross-sectional area of the teeth part and the yoke part, or to maximize the space factor of the winding. These are also in a trade-off relationship. Therefore, when designing a motor or a generator, it is necessary to optimize the shape of the armature so that the combination of the cross-sectional area of the tooth portion and the yoke portion and the space factor of the winding is optimal. However, the conventional armature core has a problem that the degree of freedom in design is low because the stacking height of the tooth portion and the yoke portion is limited to the same one. Therefore, there is a problem that it is difficult to optimize the combination of the cross-sectional area of the tooth portion and the yoke portion and the space factor of the winding.

本発明は、このような事情に鑑みてなされたものであり、鉄心片を積層して構成された電機子鉄心であって、特定の部位の積層高さが他の部位の積層高さと異なるように構成することができる電機子鉄心及び電機子鉄心の製造方法を提供するものである。 This invention is made | formed in view of such a situation, Comprising: It is an armature core comprised by laminating | stacking an iron core piece, Comprising: The lamination | stacking height of a specific site | part is different from the lamination | stacking height of another site | part. The armature core which can be comprised in this invention and the manufacturing method of an armature core are provided.

上記課題を解決するために、本発明の第１の観点に係る電機子鉄心は、複数の鉄心片を積層してなる電機子鉄心において、複数の部位を形成する形状を備える前記鉄心片を積層してなる中心部と、前記中心部に接するとともに、前記中心部を構成する前記鉄心片が備える形状の一部を欠いた形状を備える前記鉄心片を積層してなる端部と、を備えることを特徴とする。 In order to solve the above-described problem, an armature core according to a first aspect of the present invention is an armature core formed by stacking a plurality of core pieces, and the core pieces having a shape forming a plurality of portions are stacked. And an end portion formed by laminating the core pieces having a shape that is in contact with the center portion and lacks a part of the shape of the core pieces constituting the center portion. It is characterized by.

前記電機子鉄心は、ヨーク部とティース部を備えるとともに、前記中心部を構成する前記鉄心片は、前記ヨーク部と前記ティース部の両方を形成する形状を備え、前記端部を構成する前記鉄心片は、前記ティース部の全てと、前記ヨーク部の一部であって前記ティース部と連続する部分を形成する形状を欠いているようにしても良い。 The armature core includes a yoke part and a tooth part, and the iron core piece constituting the center part has a shape forming both the yoke part and the tooth part, and the iron core constituting the end part. The piece may lack all of the teeth portion and a shape that forms a part of the yoke portion that is continuous with the teeth portion.

前記電機子鉄心は、ヨーク部とティース部を備えるとともに、前記中心部を構成する前記鉄心片は、前記ヨーク部と前記ティース部の両方を形成する形状を備え、前記端部を構成する前記鉄心片は、前記ティース部の全てと、前記ヨーク部の一部であって前記ティース部と連続する部分を形成する形状を備えるようにしても良い。前記ヨーク部の前記ティース部と連続する部分は、環状に連続した形態でも良いし、前記ティース毎に独立した形態でも良い。 The armature core includes a yoke part and a tooth part, and the iron core piece constituting the center part has a shape forming both the yoke part and the tooth part, and the iron core constituting the end part. The piece may have a shape that forms all of the teeth portion and a portion that is a part of the yoke portion and that is continuous with the teeth portion. The portion of the yoke portion that is continuous with the teeth portion may have a ring-like continuous shape or an independent shape for each tooth.

前記電機子鉄心の端部に積層される前記鉄心片の前記ティース部を形成する部分の幅は、前記電機子鉄心の他の前記鉄心片の当該部分の幅より小さくなるように構成されても良い。 The width of the portion forming the teeth portion of the core piece laminated on the end portion of the armature core may be configured to be smaller than the width of the portion of the other core piece of the armature core. good.

本発明に係る電機子鉄心は、前記電機子鉄心を貫く貫通孔が形成されていて、前記貫通孔に樹脂材料が充填されているようにしても良い。 In the armature core according to the present invention, a through hole penetrating the armature core may be formed, and the through hole may be filled with a resin material.

本発明に係る電機子鉄心は、前記電機子鉄心に巻装される巻線と前記電機子鉄心の間に配置されて、両者を電気的に絶縁する絶縁体を備えるとともに、前記絶縁体は前記樹脂材料と同一の樹脂で成形されているようにしても良い。 The armature core according to the present invention includes an insulator that is disposed between a winding wound around the armature core and the armature core, and electrically insulates both, and the insulator is It may be made of the same resin as the resin material.

本発明の第２の観点に係る電機子鉄心の製造方法は、上記の電機子鉄心の製造方法であって、前記鉄心片を積層する積層工程と、積層された前記鉄心片を成形型の中に入れて、前記樹脂材料を前記成形型に注入して、前記樹脂材料を前記貫通孔に充填するとともに、前記樹脂材料と同一の樹脂で前記絶縁体を成形する充填成形工程と、を有する。 A method for manufacturing an armature core according to a second aspect of the present invention is the above-described method for manufacturing an armature core, wherein the core pieces are stacked, and the stacked core pieces are formed in a mold. And filling and filling the through hole with the resin material, and molding the insulator with the same resin as the resin material.

本発明によれば、鉄心片を積層して構成された電機子鉄心において、特定の部位の積層高さを自由に変更できるので、電機子鉄心設計の自由度が大きくなる。その結果、電機子鉄心の設計が容易になる。 According to the present invention, in the armature core configured by stacking the core pieces, the stacking height of a specific portion can be freely changed, so that the degree of freedom in armature core design is increased. As a result, the armature core can be easily designed.

また、本発明に係る方法によれば、貫通穴への樹脂材料の充填と、前記樹脂材料による絶縁体の成型を同一工程で実行するので、製造工程を合理化して、製造コストを削減することができる。 In addition, according to the method of the present invention, the filling of the resin material into the through hole and the molding of the insulator with the resin material are performed in the same process, so that the manufacturing process can be rationalized and the manufacturing cost can be reduced. Can do.

本発明の第１の実施形態に係る固定子鉄心の外形を示す斜視図である。It is a perspective view which shows the external shape of the stator core which concerns on the 1st Embodiment of this invention. 本発明の第１の実施形態に係る固定子鉄心を、回転軸を含む平面で切断した縦断面図である。It is the longitudinal cross-sectional view which cut | disconnected the stator core which concerns on the 1st Embodiment of this invention by the plane containing a rotating shaft. 本発明の第１の実施形態に係る固定子の縦断面図である。It is a longitudinal cross-sectional view of the stator which concerns on the 1st Embodiment of this invention. 本発明の別の実施形態に係る固定子鉄心の外形を示す斜視図であって、（ａ）は第２の実施形態、（ｂ）は第２の実施形態の変形例に係る固定子鉄心の外形を、それぞれ示している。It is a perspective view which shows the external shape of the stator core which concerns on another embodiment of this invention, Comprising: (a) is 2nd Embodiment, (b) is the stator core which concerns on the modification of 2nd Embodiment. The external shapes are shown respectively. 本発明の別の実施形態に係る固定子鉄心の外形を示す斜視図であって、（ａ）は第３の実施形態、（ｂ）は第４の実施形態に係る固定子鉄心の外形を、それぞれ示している。It is a perspective view which shows the external shape of the stator core which concerns on another embodiment of this invention, Comprising: (a) is 3rd Embodiment, (b) is the external shape of the stator core which concerns on 4th Embodiment, Each is shown. 第２の実施形態の説明図であって、（ａ）は固定子鉄心の縦断面図、（ｂ）は固定子の縦断面図である。It is explanatory drawing of 2nd Embodiment, Comprising: (a) is a longitudinal cross-sectional view of a stator core, (b) is a longitudinal cross-sectional view of a stator. 第３の実施形態の説明図であって、（ａ）は固定子鉄心の縦断面図、（ｂ）は固定子の縦断面図である。It is explanatory drawing of 3rd Embodiment, Comprising: (a) is a longitudinal cross-sectional view of a stator core, (b) is a longitudinal cross-sectional view of a stator. 第１の実施形態に係る固定子鉄心の変形例を示す説明図であって、（ａ）は固定子鉄心の縦断面図であり、（ｂ）は固定子鉄心を（ａ）のＡ−Ａ線で切断したティース部の横断面図であり、（ｃ）はティース部の変形例を示す横断面図である。It is explanatory drawing which shows the modification of the stator core which concerns on 1st Embodiment, Comprising: (a) is a longitudinal cross-sectional view of a stator core, (b) is a stator AA of (a). It is a cross-sectional view of the teeth part cut | disconnected by the line, (c) is a cross-sectional view which shows the modification of a teeth part. 樹脂材料の充填と絶縁体の成型を行う装置の要部を示す縦断面図である。It is a longitudinal cross-sectional view which shows the principal part of the apparatus which performs filling of a resin material and shaping | molding of an insulator. 第１の実施形態に係る電動機の縦断面図である。It is a longitudinal section of the electric motor concerning a 1st embodiment. 第３の実施形態に係る電動機の変形例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the modification of the electric motor which concerns on 3rd Embodiment. 従来技術に係る電動機の縦断面図である。It is a longitudinal cross-sectional view of the electric motor which concerns on a prior art. 第１の実施形態に係る固定子鉄心の変形例を示す斜視図であって、（ａ）は分割固定子鉄心の斜視図であり、（ｂ）は分割固定子鉄心を組み合わせて構成される固定子鉄心の斜視図である。It is a perspective view which shows the modification of the stator core which concerns on 1st Embodiment, (a) is a perspective view of a division | segmentation stator core, (b) is the fixation comprised combining a division | segmentation stator core. It is a perspective view of a child iron core.

以下、本発明に係る電機子鉄心、及び該電機子鉄心の製造方法について図面を参照しながら詳細に説明する。なお、ここでは、電動機用の電機子鉄心を例に挙げて説明する。 Hereinafter, an armature core according to the present invention and a method for manufacturing the armature core will be described in detail with reference to the drawings. Here, an armature core for an electric motor will be described as an example.

まず、図１〜図３を参照して、本発明の第１の実施形態にかかる固定子鉄心１の構成を説明する。なお、図１は、固定子鉄心１の全体の外形を示す斜視図であって、図２は固定子鉄心１を、回転軸Ｘを含む平面で切断した縦断面図である。固定子鉄心１は、後述する電動機の構成部品の一つであって、図２に示すように、鉄心片２を積層して構成され、ヨーク部３とティース部４を備えている。ヨーク部３は固定子鉄心１の外郭を構成する円輪状の部分であって、ヨーク部３の内側には、複数のティース部４が突出している。なお、鉄心片２は、例えばケイ素等を添加して鉄損を低下させた鋼板（いわゆる電磁鋼板）の薄板をプレスで打ち抜いて成形される。 First, with reference to FIGS. 1-3, the structure of the stator iron core 1 concerning the 1st Embodiment of this invention is demonstrated. FIG. 1 is a perspective view showing the overall outer shape of the stator core 1, and FIG. 2 is a longitudinal sectional view of the stator core 1 cut along a plane including the rotation axis X. The stator core 1 is one of the components of an electric motor, which will be described later. The stator core 1 is configured by laminating iron core pieces 2 and includes a yoke portion 3 and a teeth portion 4 as shown in FIG. The yoke part 3 is a ring-shaped part that constitutes the outline of the stator core 1, and a plurality of teeth parts 4 protrude from the inside of the yoke part 3. The iron core piece 2 is formed by punching out a thin plate of a steel plate (so-called electromagnetic steel plate) whose core loss has been reduced by adding silicon or the like, for example.

また、固定子鉄心１は、中心部５、上端部６及び下端部７に区分される。中心部５は、固定子鉄心１の積層高さ方向において中心部を占める位置に配置されていて、ヨーク部３とティース部４を構成する鉄心片２を積層して構成されている。上端部６は中心部５の上面に接して、下端部７は中心部５の下面に接して、それぞれ配置された部分であって、鉄心片２’を積層して構成されている。鉄心片２がヨーク部３とティース部４を形成する形状を備えているのに対して、鉄心片２’はヨーク部３を形成する形状だけを備え、ティース部４を構成する形成を備えていない。つまり、上端部６及び下端部７を構成する鉄心片２’は中心部５を構成する鉄心片２とは形状が異なる。なお、鉄心片２’は、鉄心片２と同様に、電磁鋼板の薄板をプレスで打ち抜いて成形される。また、図２においては、煩雑を避けるために、鉄心片２、２’の断面にハッチングを施していない。図３以下についても同様である。 The stator core 1 is divided into a central part 5, an upper end part 6 and a lower end part 7. The central portion 5 is disposed at a position occupying the central portion in the stacking height direction of the stator core 1, and is configured by stacking the core pieces 2 constituting the yoke portion 3 and the teeth portion 4. The upper end portion 6 is in contact with the upper surface of the center portion 5, and the lower end portion 7 is in contact with the lower surface of the center portion 5. The core piece 2 has a shape that forms the yoke portion 3 and the tooth portion 4, whereas the iron core piece 2 ′ has only the shape that forms the yoke portion 3, and the formation that forms the tooth portion 4. Absent. That is, the shape of the iron core piece 2 ′ constituting the upper end portion 6 and the lower end portion 7 is different from that of the iron core piece 2 constituting the center portion 5. The iron core piece 2 ′ is formed by punching out a thin magnetic steel sheet with a press in the same manner as the iron core piece 2. In FIG. 2, in order to avoid complication, the cross sections of the iron core pieces 2, 2 ′ are not hatched. The same applies to FIG.

このように、中心部５は鉄心片２を積層して構成され、上端部６と下端部７は鉄心片２’を積層して構成されるので、ティース部４は中心部５にだけ形成されて、上端部６と下端部７には形成されない。このため、ティース部４の積層高さはヨーク部３の積層高さに比べて小さくなる。 Thus, the central portion 5 is configured by stacking the iron core pieces 2, and the upper end portion 6 and the lower end portion 7 are configured by stacking the iron core pieces 2 ′, so that the teeth portion 4 is formed only in the central portion 5. The upper end 6 and the lower end 7 are not formed. For this reason, the stacking height of the teeth part 4 is smaller than the stacking height of the yoke part 3.

また、固定子鉄心１のヨーク部３には、固定子鉄心１の上面から下面までを貫く貫通孔８が形成されている。貫通孔８は、鉄心片２、２’をプレスで打ち抜いて成形する際に、鉄心片２、２’を貫く透穴を形成して、該透穴の位置を合わせて、鉄心片２、２’を積層することによって形成される。貫通孔８には、図３に示すように、樹脂材料１０が充填されている。樹脂材料１０は、貫通孔８内で硬化して、鉄心片２、２’を互いに締結している。 Further, a through-hole 8 that penetrates from the upper surface to the lower surface of the stator core 1 is formed in the yoke portion 3 of the stator core 1. The through-hole 8 is formed by punching the core pieces 2 and 2 ′ with a press to form through-holes that penetrate the core pieces 2 and 2 ′, and aligning the positions of the through-holes 8. It is formed by laminating. As shown in FIG. 3, the through hole 8 is filled with a resin material 10. The resin material 10 is hardened in the through hole 8 and fastens the core pieces 2 and 2 ′.

同じく、図３に示すように、固定子９のティース部４には絶縁体１１が取り付けられていて、絶縁体１１の上には巻線１２が巻装されている。絶縁体１１は、固定子鉄心１と巻線１２を電気的に絶縁する部材であって、一般にインシュレータと呼ばれる。なお、絶縁体１１は、樹脂材料１０の貫通孔８への充填と同一工程において、樹脂材料１０と同一の樹脂で成型される。この工程の詳細については後述する。 Similarly, as shown in FIG. 3, an insulator 11 is attached to the tooth portion 4 of the stator 9, and a winding 12 is wound on the insulator 11. The insulator 11 is a member that electrically insulates the stator core 1 and the winding 12 and is generally called an insulator. The insulator 11 is molded from the same resin as the resin material 10 in the same process as filling the through hole 8 with the resin material 10. Details of this step will be described later.

樹脂材料１０は、硬化前は流動性を有していて、加圧注入による充填と成型が可能であって、硬化後は所望の機械的強度と電気的絶縁性を発揮するものであれば、その種類は特に限定されないが、本実施形態では樹脂材料１０としてエポキシ系樹脂を使用している。エポキシ系樹脂は熱硬化樹脂であって、固定子９の製造過程あるいは使用中に高温に曝されても、軟化、液化することがないので都合が良い。もっとも、製造過程あるいは使用中において、固定子９が曝される温度が、当該樹脂が軟化する温度よりも低ければ、熱可塑性樹脂を樹脂材料１０として使用することも可能である。 If the resin material 10 has fluidity before curing, can be filled and molded by pressure injection, and exhibits desired mechanical strength and electrical insulation after curing, Although the kind is not specifically limited, In this embodiment, the epoxy resin is used as the resin material 10. The epoxy resin is a thermosetting resin, which is convenient because it is not softened or liquefied even if it is exposed to a high temperature during the manufacturing process or use of the stator 9. However, if the temperature at which the stator 9 is exposed during the manufacturing process or in use is lower than the temperature at which the resin softens, a thermoplastic resin can be used as the resin material 10.

固定子鉄心１と巻線１２を電気的に絶縁する方法としては、ティース部に絶縁フィルムや絶縁紙を巻きつけて絶縁層を形成する方法や、別工程で成形した絶縁部材をティースに装着する方法等もあるが、樹脂材料１０を貫通孔８への充填と絶縁体１１の成形を同一工程で実行すれば、生産性が向上する。 As a method of electrically insulating the stator core 1 and the winding 12, a method of forming an insulating layer by winding an insulating film or paper around a tooth portion, or an insulating member molded in a separate process is attached to the teeth. Although there are methods and the like, productivity can be improved by filling the resin material 10 into the through holes 8 and molding the insulator 11 in the same process.

次に、図４と図５を参照して、本発明の他の実施形態に係る固定子鉄心１の構成を説明する。本発明の第２の実施形態に係る固定子鉄心１は、図４（ａ）に示すように、中心部５はヨーク部３とティース部４の両方を備え、上端部６及び下端部７はティース部４の全てと、前記ヨーク部３の一部を欠いた形状を備えることを特徴としている。つまり、上端部６及び下端部７は、ティース部４の全てと、全体として環状に構成されたヨーク部３の内側にあってティース部４と連続する環状部を欠いた形状を備えている。第２の実施形態に係る固定子鉄心１は、図４（ｂ）に示すように、上端部６において、ヨーク部３のティース部４とつながる部分を部分的に切り欠くようにしても良い。この場合、上端部６のヨーク部３の内、ティース部４とつながらない部分の幅は、中心部５のヨーク部３の幅と同じになる。 Next, with reference to FIG. 4 and FIG. 5, the structure of the stator core 1 which concerns on other embodiment of this invention is demonstrated. As shown in FIG. 4A, the stator core 1 according to the second embodiment of the present invention includes a central portion 5 including both a yoke portion 3 and a teeth portion 4, and an upper end portion 6 and a lower end portion 7 are It is characterized by having a shape lacking all of the teeth part 4 and part of the yoke part 3. That is, the upper end portion 6 and the lower end portion 7 have a shape lacking all of the tooth portions 4 and an annular portion that is continuous with the teeth portion 4 inside the yoke portion 3 that is formed in an annular shape as a whole. As shown in FIG. 4B, the stator core 1 according to the second embodiment may be formed by partially notching a portion connected to the tooth portion 4 of the yoke portion 3 in the upper end portion 6. In this case, the width of the portion of the upper end portion 6 that is not connected to the teeth portion 4 of the yoke portion 3 is the same as the width of the yoke portion 3 of the center portion 5.

本発明の第３の実施形態に係る固定子鉄心１は、図５（ａ）に示すように、中心部５はヨーク部３とティース部４の両方を備え、上端部６及び下端部７はティース部４の全てと、ヨーク部３の一部を備えることを特徴としている。また、上端部６及び下端部７が備えるヨーク部３の一部は全体として環状に構成され、ティース部４と連続している。つまり、上端部６及び下端部７は、第２の実施形態において欠いていた部分を備え、第２の実施形態において備えていた部分を備えていないことを特徴としている。なお、図５（ａ）においては、下端部７は中心部５の下に隠れて見えない。 As shown in FIG. 5A, the stator core 1 according to the third embodiment of the present invention includes a central portion 5 having both a yoke portion 3 and a tooth portion 4, and an upper end portion 6 and a lower end portion 7 are It is characterized by including all of the teeth part 4 and a part of the yoke part 3. Further, a part of the yoke part 3 provided in the upper end part 6 and the lower end part 7 is formed in an annular shape as a whole and is continuous with the tooth part 4. That is, the upper end portion 6 and the lower end portion 7 are characterized by including a portion lacking in the second embodiment and not including a portion provided in the second embodiment. In FIG. 5A, the lower end portion 7 is hidden under the center portion 5 and cannot be seen.

本発明の第４の実施形態に係る固定子鉄心１は、図５（ｂ）に示すように、中心部５はヨーク部３とティース部４の両方を備え、上端部６及び下端部７は、ティース部４毎に分割された形状であって、ティース部４の全てとヨーク部３の一部を備える形状を備えることを特徴としている。なお、図５（ｂ）においても、下端部７は中心部５の下に隠れて見えない。 As shown in FIG. 5B, the stator core 1 according to the fourth embodiment of the present invention includes a central portion 5 having both a yoke portion 3 and a teeth portion 4, and an upper end portion 6 and a lower end portion 7 are The shape is divided for each tooth portion 4, and has a shape including all of the tooth portions 4 and a part of the yoke portion 3. In FIG. 5B as well, the lower end portion 7 is hidden under the central portion 5 and cannot be seen.

次に、図６を参照して、第２の実施形態に係る固定子鉄心１と固定子９の特徴を説明する。前述したように、上端部６及び下端部７は、ティース部４の全てと、全体として環状に構成されたヨーク部３の内側にあってティース部４と連続する環状部を欠いている。そのため、縦断面図（電動機の回転軸を含む平面で切断して得られる断面）で見ると、図６（ａ）に示すように、上端部６と下端部７におけるヨーク部３の幅は、中心部５におけるヨーク部３の幅より小さくなる。なお、図中の破線は中心部５における、ヨーク部３とティース部４の境界を示している。このように構成されているので、図６（ｂ）に示すように、ティース部４の周囲に絶縁部１１を形成する場合に、絶縁部１１の一部（図において左端）をヨーク部３側に張り出すように成型できる。つまり、上端部６及び下端部７において、ヨーク部３の一部が切り欠かれた部分に絶縁部１１の左端部を形成することができる。そのため絶縁部１１の内側寸法を拡大して、巻線１２の占積率を拡大することができる。 Next, the features of the stator core 1 and the stator 9 according to the second embodiment will be described with reference to FIG. As described above, the upper end portion 6 and the lower end portion 7 lack the annular portion that is continuous with the teeth portion 4 inside the yoke portion 3 that is formed in an annular shape as a whole and the teeth portion 4 as a whole. Therefore, when viewed in a longitudinal sectional view (a cross section obtained by cutting along a plane including the rotating shaft of the electric motor), the width of the yoke portion 3 at the upper end portion 6 and the lower end portion 7 is as shown in FIG. It becomes smaller than the width of the yoke part 3 in the center part 5. In addition, the broken line in a figure has shown the boundary of the yoke part 3 and the teeth part 4 in the center part 5. FIG. 6B, when the insulating portion 11 is formed around the teeth portion 4 as shown in FIG. 6B, a part (left end in the drawing) of the insulating portion 11 is placed on the yoke portion 3 side. Can be molded so as to overhang. That is, at the upper end portion 6 and the lower end portion 7, the left end portion of the insulating portion 11 can be formed in a portion where a part of the yoke portion 3 is notched. Therefore, the space factor of the coil | winding 12 can be expanded by enlarging the inner dimension of the insulation part 11. FIG.

次に、図７を参照して、第３の実施形態に係る固定子鉄心１と固定子９の特徴を説明する。前述したように、第３の実施形態に係る固定子鉄心１は、上端部６及び下端部７にティース部４の全てと、ヨーク部３の一部を備えることを特徴としている。また、ヨーク部３の前記一部は全体として環状に構成され、ティース部４と連続している。これを縦断面図で見ると、図７（ａ）に示すように、上端部６と下端部７の左端は、ヨーク部３とティース部４の境界を越えて図の左側に張り出している。このように構成されているので、図７（ｂ）に示すように、絶縁部１１の一部（図において左端）をヨーク部３側に張り出すように成型でき、第２の実施の形態と同様に、絶縁部１１の内側寸法を拡大して、巻線１２の占積率を拡大することができる。また、第３の実施形態に係る固定子鉄心１は、ヨーク部３に形成された貫通孔８に加えて、ティース部４に貫通孔８’が形成される。図７（ｂ）に示すように、貫通孔８’には樹脂材料１０と同一の樹脂材料１０’が充填されて、上端部６と下端部７を中心部５と締結している。 Next, the features of the stator core 1 and the stator 9 according to the third embodiment will be described with reference to FIG. As described above, the stator core 1 according to the third embodiment is characterized in that the upper end portion 6 and the lower end portion 7 are provided with all of the tooth portions 4 and a part of the yoke portion 3. Further, the part of the yoke portion 3 is formed in an annular shape as a whole and is continuous with the tooth portion 4. When this is viewed in a longitudinal sectional view, as shown in FIG. 7A, the left ends of the upper end portion 6 and the lower end portion 7 protrude beyond the boundary between the yoke portion 3 and the tooth portion 4 to the left side of the drawing. Since it is configured in this way, as shown in FIG. 7B, a part of the insulating portion 11 (the left end in the figure) can be molded so as to protrude toward the yoke portion 3 side, and the second embodiment and Similarly, the space factor of the winding 12 can be increased by expanding the inner dimension of the insulating portion 11. Further, in the stator core 1 according to the third embodiment, a through hole 8 ′ is formed in the tooth portion 4 in addition to the through hole 8 formed in the yoke portion 3. As shown in FIG. 7B, the through hole 8 ′ is filled with the same resin material 10 ′ as the resin material 10, and the upper end portion 6 and the lower end portion 7 are fastened to the central portion 5.

第１の実施形態に係る固定子９は、図８に示すように構成されても良い。この固定子９は、図８（ａ）に現れる縦断面形においては、図３に示した固定子９と同様に構成されているが、ティース部４をＡ−Ａ線で切断した横断面形に特徴がある。すなわち、図８（ｂ）に示すように、ティース部４の最上段と最下段にある鉄心片２’ａの幅、つまり図８（ｂ）に現れる横方向の長さが、他の鉄心片２に比べて小さい。このように構成することによって、絶縁体１１の横断面の隅部の曲率半径を大きくできるので、巻線１２（図８において図示せず）の巻装が容易になる。また、隅部の曲率半径を大きくすると、絶縁体１１の横断面の周長が短くなる。その結果、巻線１２の長さが短くなるので、銅損が減少し、電動機の効率が向上する。幅を短くする鉄芯は最上段と最下段にある鉄心片２’ａに限られない。図８（ｃ）に示すように、ティース部４の最上段と最下段において、鉄心片２’ａ、２’ｂ、２’ｃを順に積層して、ティース部４の幅が漸増するようにしても良い。なお、このような構成は、他の実施形態に係る固定子９にも適用することができる。 The stator 9 according to the first embodiment may be configured as shown in FIG. The stator 9 is configured in the same manner as the stator 9 shown in FIG. 3 in the longitudinal cross-sectional shape appearing in FIG. 8A, but the cross-sectional shape obtained by cutting the teeth portion 4 along the line AA. There is a feature. That is, as shown in FIG. 8 (b), the width of the iron core pieces 2'a at the uppermost and lowermost stages of the tooth portion 4, that is, the lateral length appearing in FIG. Smaller than 2. With such a configuration, the radius of curvature of the corner of the cross section of the insulator 11 can be increased, so that the winding 12 (not shown in FIG. 8) can be easily wound. Moreover, if the curvature radius of a corner part is enlarged, the perimeter of the cross section of the insulator 11 will become short. As a result, since the length of the winding 12 is shortened, the copper loss is reduced and the efficiency of the electric motor is improved. The iron core for reducing the width is not limited to the iron core pieces 2'a at the uppermost and lowermost stages. As shown in FIG. 8 (c), the core pieces 2′a, 2′b, 2′c are sequentially laminated at the uppermost and lowermost stages of the tooth portion 4 so that the width of the tooth portion 4 gradually increases. May be. Such a configuration can also be applied to the stator 9 according to another embodiment.

次に、固定子鉄心１の製造方法について説明する。なお、以下において、第２の実施形態に係る固定子鉄心１を例にして、その製造方法を説明するが、他の実施形態に係る固定子鉄心１も同じ方法で製造できる。 Next, a method for manufacturing the stator core 1 will be described. In the following, the method for manufacturing the stator core 1 according to the second embodiment will be described as an example, but the stator core 1 according to another embodiment can be manufactured by the same method.

固定子鉄心１の製造にあたっては、まず、硅素鋼鈑等の電磁鋼鈑をプレスで打ち抜いて、鉄心２及び鉄心２’を形成する。そして、貫通孔８が形成されるように、位置を揃えて、鉄心片２及び鉄心片２’を積層する（積層工程）。この時、鉄心片２及び鉄心片２’を正しく積層するために治具を使用しても良いし、積層された鉄心片２及び鉄心片２’を一時的に固定するクリップのようなものを使用しても良い。次に、積層された鉄心片２及び鉄心片２’を、後述する成形型に入れて、貫通孔８に樹脂を注入して、貫通孔８を樹脂材料１０で充填するとともに、樹脂材料１０と同一の樹脂を前記成形型に注入して絶縁体１１を成型する（充填成型工程）。 In manufacturing the stator core 1, first, an electromagnetic steel plate such as a silicon steel plate is punched out with a press to form the iron core 2 and the iron core 2 '. Then, the iron core piece 2 and the iron core piece 2 ′ are laminated so as to form the through hole 8 (lamination process). At this time, a jig may be used to correctly stack the iron core piece 2 and the iron core piece 2 ′, or a clip such as a clip for temporarily fixing the iron core piece 2 and the iron core piece 2 ′ stacked. May be used. Next, the laminated iron core piece 2 and iron core piece 2 ′ are put into a molding die to be described later, a resin is injected into the through hole 8, the through hole 8 is filled with the resin material 10, and the resin material 10 and The same resin is injected into the mold to mold the insulator 11 (filling molding process).

充填成型工程において使用される成形型は図９に示すような上金型１３と下金型１４とから構成されていて、充填成型工程は、固定子鉄心１を上金型１３と下金型１４の間に挟んで行う。上金型１３と下金型１４は図示しない樹脂充填装置に取り付けられて、固定子鉄心１を押圧する。上金型１３は充填用樹脂注入口１５と成型用樹脂注入口１６を備えている。充填用樹脂注入口１５は貫通孔８に連通している。成型用樹脂注入口１６は固定子鉄心１と上金型１３及び下金型１４の間に形成された隙間１７に連通している。隙間１７は絶縁体１１を成形する鋳型として機能する形状を備えている。そして、前記樹脂充填装置から樹脂材料１０の原料樹脂が供給され、充填用樹脂注入口１５と成型用樹脂注入口１６を通じて、貫通孔８と隙間１７に注入される。その後、所定の温度に加温すると、前記原料樹脂は貫通孔８と隙間１７において硬化して樹脂材料１０を形成する。隙間１７において硬化した前記原料樹脂は絶縁体１１を形成する。その後、固定子鉄心１を上金型１３と下金型１４から取り出して、ゲートの切断等の後処理を行えば、充填成型工程は完了する。なお、前記樹脂充填装置は公知であるので、その詳細な機構の説明は省略する。必要ならば、例えば、特開２０１４−７８９９号公報、特開２０１４−９６９４２号公報等を参照されたい。 The mold used in the filling molding process is composed of an upper mold 13 and a lower mold 14 as shown in FIG. 9, and in the filling molding process, the stator core 1 is replaced with the upper mold 13 and the lower mold. 14 is performed. The upper mold 13 and the lower mold 14 are attached to a resin filling device (not shown) and press the stator core 1. The upper mold 13 includes a filling resin inlet 15 and a molding resin inlet 16. The filling resin injection port 15 communicates with the through hole 8. The molding resin injection port 16 communicates with a gap 17 formed between the stator core 1 and the upper mold 13 and the lower mold 14. The gap 17 has a shape that functions as a mold for molding the insulator 11. Then, the raw material resin of the resin material 10 is supplied from the resin filling device and is injected into the through hole 8 and the gap 17 through the filling resin inlet 15 and the molding resin inlet 16. Thereafter, when heated to a predetermined temperature, the raw material resin is cured in the through holes 8 and the gaps 17 to form the resin material 10. The raw material resin cured in the gap 17 forms the insulator 11. Then, if the stator core 1 is taken out from the upper mold 13 and the lower mold 14 and post-processing such as cutting of the gate is performed, the filling molding process is completed. In addition, since the said resin filling apparatus is well-known, the description of the detailed mechanism is abbreviate | omitted. If necessary, refer to, for example, JP 2014-7899 A, JP 2014-96942 A, and the like.

上記製造方法によれば、貫通孔８へ樹脂材料１０を充填するのと、実質的に同時に、樹脂材料１０で絶縁体１１を成型するので、固定子鉄心の製造工程を合理化して生産コストを低減することができる。また、固定子鉄心１に合わせて絶縁体１１を成形するので、絶縁体１１を別工程で成形してティースに装着する場合に必要な、固定子鉄心１の寸法のばらつきに対応する余裕を絶縁体１１に持たせる必要がない。そのため、絶縁体１１の寸法余裕に起因する巻線１２の占積率の低下や鉄心占積率の低下が生じない。 According to the above manufacturing method, since the insulator 11 is molded with the resin material 10 substantially simultaneously with the filling of the resin material 10 into the through-hole 8, the manufacturing process of the stator core is rationalized and the production cost is reduced. Can be reduced. Further, since the insulator 11 is formed in accordance with the stator core 1, the margin corresponding to the variation in the dimensions of the stator core 1 that is necessary when the insulator 11 is formed in a separate process and attached to the teeth is insulated. The body 11 does not need to be held. Therefore, a decrease in the space factor of the winding 12 and a decrease in the core space factor due to the dimensional margin of the insulator 11 do not occur.

最後に、図１０と図１１を参照して、本発明の実施形態に係る電動機１８について、説明する。図１０に示した電動機１８は、回転軸１９を介してハウジング２０に回転自在に支持された回転子２１を備え、固定子９はハウジング２０の内部に、回転子２１と同軸に配置されている。固定子９は図３に示した固定子鉄心１を備えている。また、固定子９の上下にあって、固定子９とハウジング２０に挟まれた空隙２２，２３には、電動機１８の図示しない構成部品、例えば、端子台や、巻線１２に電力を供給する配線が収容される。 Finally, with reference to FIG. 10 and FIG. 11, the electric motor 18 which concerns on embodiment of this invention is demonstrated. An electric motor 18 shown in FIG. 10 includes a rotor 21 that is rotatably supported by a housing 20 via a rotating shaft 19, and the stator 9 is disposed inside the housing 20 and coaxially with the rotor 21. . The stator 9 includes the stator core 1 shown in FIG. In addition, power is supplied to components (not shown) of the electric motor 18 such as a terminal block and the windings 12 in the gaps 22 and 23 above and below the stator 9 and sandwiched between the stator 9 and the housing 20. The wiring is accommodated.

図１０に示した電動機１８の固定子鉄心１は、ヨーク部３を形成する形状だけを備える鉄心片２’を積層して上端部６及び下端部７を構成しているので、ティース部４の積層高さを変えずに、ヨーク部３の積層高さだけを高くすることができる。ヨーク部３の積層高さを高くすれば、ヨーク部３の断面積が大きくなるから、ヨーク部３を通過する磁束密度が小さくなる。その結果、鉄損が減少するから、電動機１８の効率が向上する。なお、この時、ティース部４の積層高さは変らないから、巻線１２の長さも変わらないので、銅損は変わらない。ヨーク部３の断面積を一定にして、ヨーク部３の積層高さを高くする設計を選択すれば、ヨーク部３の幅を小さくできるので、その分、ティース部４の長さを長くして、巻線１２の占積率を拡大できる。その結果、電動機１８の出力と効率が向上する。電動機１８の外径とティース部４の長さを一定にした場合に、ヨーク部３の積層高さを高くして、ヨーク部３の幅を小さくすれば、回転子２１の外径を大きくすることができる。その結果、電動機１８の出力が向上する。 Since the stator core 1 of the electric motor 18 shown in FIG. 10 includes the upper end 6 and the lower end 7 by laminating the core pieces 2 ′ having only the shape forming the yoke portion 3, Only the stacking height of the yoke part 3 can be increased without changing the stacking height. If the lamination height of the yoke part 3 is increased, the cross-sectional area of the yoke part 3 is increased, so that the magnetic flux density passing through the yoke part 3 is reduced. As a result, since the iron loss is reduced, the efficiency of the electric motor 18 is improved. At this time, since the stacking height of the teeth portion 4 does not change, the length of the winding 12 does not change, so the copper loss does not change. The width of the yoke part 3 can be reduced by selecting a design in which the cross-sectional area of the yoke part 3 is constant and the stacking height of the yoke part 3 is increased, so that the length of the tooth part 4 is increased accordingly. The space factor of the winding 12 can be expanded. As a result, the output and efficiency of the electric motor 18 are improved. When the outer diameter of the electric motor 18 and the length of the tooth portion 4 are made constant, the outer diameter of the rotor 21 is increased by increasing the stacking height of the yoke portion 3 and decreasing the width of the yoke portion 3. be able to. As a result, the output of the electric motor 18 is improved.

また、図１０に示した電動機１８の固定子鉄心１は、ヨーク部３において鉄心片２’を積み上げているので、ヨーク部３とハウジング２０に挟まれた空隙２２を、図１２に示した従来技術に係る電動機１８に比べて、小さくすることができる。つまり、ハウジング２０内の無駄なスペースを小さくできる。 Further, since the stator core 1 of the electric motor 18 shown in FIG. 10 has the core pieces 2 ′ stacked in the yoke portion 3, the gap 22 sandwiched between the yoke portion 3 and the housing 20 is formed in the prior art shown in FIG. 12. Compared to the electric motor 18 according to the technology, it can be made smaller. That is, a useless space in the housing 20 can be reduced.

図１１に示した電動機１８の固定子９の固定子鉄心１は、ティース部４を構成する形状だけを備える鉄心片２’を積層して上端部６及び下端部７を構成している。したがって、図１０に示した電動機１８の固定子９の固定子鉄心１の場合とは逆に、この固定子鉄心１においては、ティース部４の積層高さはヨーク部３より高い。また、ヨーク部３の上下に空隙２２が形成されていて、空隙２２に、端子台や、巻線１２に電力を供給する配線を収容できる。 In the stator core 1 of the stator 9 of the electric motor 18 shown in FIG. 11, the upper end portion 6 and the lower end portion 7 are configured by laminating core pieces 2 ′ having only the shape constituting the tooth portion 4. Therefore, contrary to the case of the stator core 1 of the stator 9 of the electric motor 18 shown in FIG. 10, the stacked height of the teeth portion 4 is higher than that of the yoke portion 3 in the stator core 1. Further, a gap 22 is formed above and below the yoke portion 3, and a wiring for supplying power to the terminal block and the winding 12 can be accommodated in the gap 22.

このように、図１１に示した電動機１８は、ティース部４の積層高さを高くしているので、ティース部４の断面積を拡大して、ティース部４を通過する磁束密度を小さくすることができる。その結果、ティース部４における鉄損が減少するので、電動機１８の効率が向上する。あるいは、ティース部４に生じる磁束を大きくすることができるので、電動機１８の出力を大きくすることができる。 As described above, since the electric motor 18 shown in FIG. 11 has a higher stacking height of the teeth portion 4, the cross-sectional area of the teeth portion 4 is enlarged and the magnetic flux density passing through the teeth portion 4 is reduced. Can do. As a result, since the iron loss in the tooth part 4 is reduced, the efficiency of the electric motor 18 is improved. Or since the magnetic flux which arises in the teeth part 4 can be enlarged, the output of the electric motor 18 can be enlarged.

また、図１１に示した電動機１８の固定子鉄心１は、ティース部４において鉄心片２’を積み上げているので、図１２に示した従来技術に係る電動機１８にあった、ティース部４とハウジング２０に挟まれた空隙２３を無くすことができる。つまり、ハウジング２０内の無駄なスペースを小さくできる。 Further, since the stator core 1 of the electric motor 18 shown in FIG. 11 has the core pieces 2 ′ stacked in the tooth portion 4, the tooth portion 4 and the housing that existed in the electric motor 18 according to the prior art shown in FIG. The gap 23 sandwiched between 20 can be eliminated. That is, a useless space in the housing 20 can be reduced.

なお、図６（ｂ）と図７（ｂ）に示した固定子９を用いれば、それぞれ、第２の実施形態と第３の実施形態に係る電動機１８を構成することができる。図５（ｂ）に示した固定子鉄心１を用いれば、第４の実施形態に係る電動機１８を構成することができる。 In addition, if the stator 9 shown in FIG.6 (b) and FIG.7 (b) is used, the electric motor 18 which concerns on 2nd Embodiment and 3rd Embodiment can be comprised, respectively. If the stator core 1 shown in FIG. 5B is used, the electric motor 18 according to the fourth embodiment can be configured.

なお、上記の実施形態は本発明の具体的実施態様を例示するものであって、本発明の技術的範囲を画すものではない。本発明は特許請求の範囲に記述された技術的思想の限りにおいて、自由に変形、応用あるいは改良して実施することができる。 In addition, said embodiment illustrates the specific embodiment of this invention, and does not delimit the technical scope of this invention. The present invention can be freely modified, applied or improved within the scope of the technical idea described in the claims.

上記実施形態においては、本発明を固定子鉄心１に適用する例を示したが、本発明の適用対象は、固定子鉄心には限定されない。本発明は、回転子鉄心に適用することもできる。 In the said embodiment, although the example which applies this invention to the stator core 1 was shown, the application object of this invention is not limited to a stator core. The present invention can also be applied to a rotor core.

図１等に示した固定子鉄心１の形状や形態は例示であって、本発明の適用対象は、かかる形状や形態を備える電機子鉄心には限定されない。例えば、ヨーク部３の形状、ティース部４の形状や個数、中心部５、上端部６及び下端部７の寸法比率は例示であって、本発明の技術的範囲は、これらによっては限定されない。 The shape and form of the stator core 1 shown in FIG. 1 and the like are examples, and the application target of the present invention is not limited to the armature core having such a shape and form. For example, the shape of the yoke portion 3, the shape and number of the tooth portions 4, the dimensional ratio of the center portion 5, the upper end portion 6 and the lower end portion 7 are examples, and the technical scope of the present invention is not limited by these.

上記実施形態において、本発明に係る「端部」の具体例として、上端部６と下端部７を例示したが、「端部」を「上端部」と「下端部」に限定する意図はない。例えば、固定子鉄心１を反転させれば、上端部６と下端部７は入れ替わるし、固定子鉄心１を横転させれば、左端部と右端部が「端部」になる。 In the above embodiment, the upper end 6 and the lower end 7 are illustrated as specific examples of the “end” according to the present invention, but the “end” is not intended to be limited to the “upper end” and the “lower end”. . For example, if the stator core 1 is reversed, the upper end 6 and the lower end 7 are interchanged, and if the stator core 1 is turned over, the left end and the right end become “ends”.

上記実施形態においては、中心部の両端面に端部が対称に配置された例を例示したが、本発明の技術的範囲は、対称に配置された端部を備えるものには限定されない。例えば、上端部６と下端部７の形状や寸法は異なっていても良いし、上端部６あるいは下端部７のいずれか一方だけを備えるものであっても良い。 In the said embodiment, although the example in which the edge part was symmetrically arrange | positioned at the both end surfaces of the center part was illustrated, the technical scope of this invention is not limited to what is provided with the edge part arrange | positioned symmetrically. For example, the shapes and dimensions of the upper end 6 and the lower end 7 may be different, or only one of the upper end 6 or the lower end 7 may be provided.

上記実施形態においては、貫通孔８をヨーク部３に形成した例（図１〜５，６，８〜１０，１２）と貫通孔８に加えて、貫通孔８’をティース部４に形成した例（図７，１１）を例示したが、本発明の技術的範囲は、これらには限定されない。貫通孔をどこに形成するかは、全くの任意である。 In the above embodiment, in addition to the example in which the through hole 8 is formed in the yoke portion 3 (FIGS. 1 to 5, 6, 8 to 10, 12) and the through hole 8, the through hole 8 ′ is formed in the tooth portion 4. Although examples (FIGS. 7 and 11) have been illustrated, the technical scope of the present invention is not limited thereto. Where the through hole is formed is completely arbitrary.

上記実施形態においては、貫通孔８に充填され、絶縁体１１を形成する樹脂材料１０としてエポキシ系樹脂を例示したが、本発明の技術的範囲はエポキシ系樹脂を使用するものには限定されない。樹脂材料の選択は全くの任意である。 In the said embodiment, although the epoxy resin was illustrated as the resin material 10 with which it fills the through-hole 8 and forms the insulator 11, the technical scope of this invention is not limited to what uses an epoxy resin. The selection of the resin material is completely arbitrary.

上記実施形態においては、貫通孔へ樹脂材料を充填すると同時に、前記樹脂材料による絶縁体の成形を実行したが、両者は同一工程において実行されれば良い。つまり、充填と成形は同時に実行されても良いし、連続して実行されても良い。また、連続して実行される場合の順序は限定されない。なお、貫通孔８に充填する樹脂材料１０と同一の樹脂材料で絶縁体１１を成形したが、貫通孔８への充填と絶縁体１１の成形のそれぞれに適した樹脂材料となるように、添加するフィラー等の種類、量を異なるものにしても良い。この場合、複数種の原料樹脂を供給できるように、樹脂充填装置を構成すれば良い。 In the above embodiment, the resin material is filled into the through-hole and at the same time, the insulator is molded by the resin material. However, both may be performed in the same process. That is, filling and molding may be performed simultaneously or continuously. Moreover, the order in the case of performing continuously is not limited. Note that the insulator 11 is molded from the same resin material as the resin material 10 that fills the through hole 8, but added so as to be a resin material suitable for filling the through hole 8 and molding the insulator 11. Different types and amounts of fillers may be used. In this case, what is necessary is just to comprise a resin filling apparatus so that multiple types of raw material resin can be supplied.

上記実施形態において示した、絶縁体１１及び上金型１３、下金型１４の形状は例示であって、本発明の技術的範囲はこれらによっては限定されない。 The shapes of the insulator 11, the upper mold 13, and the lower mold 14 shown in the above embodiment are merely examples, and the technical scope of the present invention is not limited by these.

図１０、１１において、空隙２２、２３を例示したが、本発明の技術的範囲は、空隙２２、２３の有無や位置によっては限定されない。 In FIGS. 10 and 11, the gaps 22 and 23 are illustrated, but the technical scope of the present invention is not limited by the presence or absence and positions of the gaps 22 and 23.

上記実施形態においては、鉄心片の材料として電磁鋼板を例示したが、本発明の技術的範囲は電磁鋼板を使用するものには限定されない。冷延鋼板やアモルファス等、電機子鉄心を構成可能な材料であれば良く、材料の選択は全くの任意である。 In the said embodiment, although the electromagnetic steel plate was illustrated as a material of an iron core piece, the technical scope of this invention is not limited to what uses an electromagnetic steel plate. Any material can be used as long as it is a material that can constitute the armature core, such as a cold-rolled steel sheet or an amorphous material, and the selection of the material is arbitrary.

上記実施形態においては、いわゆる一体型の固定子鉄心１を例示したが、固定子鉄心１は図１３に示すような分割型の固定子鉄心１であっても良い。すなわち、図１３（ａ）に示すような分割固定子鉄心２４を８個、環状に配列して、図１３（ｂ）に示すような固定子鉄心１を構成しても良い。なお、分割固定子鉄心２４は、固定子鉄心１を８分割したものには限定されない。例えば、分割固定子鉄心２４は、固定子鉄心１を４分割したものであっても良いし、１２分割したものであっても良い。つまり、４個の分割固定子鉄心２４を組み合わせて固定子鉄心１が構成されても良いし、１２個の分割固定子鉄心２４を組み合わせて固定子鉄心１が構成されても良い。また、1個の分割固定子鉄心２４が備えるティース部４は１個には、限定されない。1個の分割固定子鉄心２４が複数個のティース部４を備えるようにしても良い。 In the above-described embodiment, the so-called integral stator core 1 is illustrated, but the stator core 1 may be a split stator core 1 as shown in FIG. That is, the stator core 1 as shown in FIG. 13B may be configured by arranging eight divided stator cores 24 as shown in FIG. The split stator core 24 is not limited to one obtained by dividing the stator core 1 into eight parts. For example, the divided stator core 24 may be one obtained by dividing the stator core 1 into four parts or may be divided into twelve parts. That is, the stator core 1 may be configured by combining four divided stator cores 24, or the stator core 1 may be configured by combining twelve divided stator cores 24. Moreover, the teeth part 4 with which one division | segmentation stator core 24 is provided is not limited to one. One divided stator core 24 may include a plurality of teeth 4.

上記実施形態においては、貫通孔に樹脂材料を充填することで鉄心片を相互に接合した固定子鉄心を例示したが、接合手段は樹脂材料の充填には限定されない。かしめ等の別の接合手段を選択してもよい。 In the said embodiment, although the stator core which joined the core piece mutually by filling the resin material to the through-hole was illustrated, the joining means is not limited to filling of the resin material. Another joining means such as caulking may be selected.

上記実施形態においては、固定子の内径側に回転子を配置するインナーロータタイプを例示したが、固定子の外径側に回転子を配置するアウターロータタイプでも良い。 In the above embodiment, the inner rotor type in which the rotor is arranged on the inner diameter side of the stator is illustrated, but an outer rotor type in which the rotor is arranged on the outer diameter side of the stator may be used.

１固定子鉄心
２鉄心片
２’鉄心片
３ヨーク部
４ティース部
５中心部
６上端部
７下端部
８貫通孔
８’貫通孔
９固定子
１０樹脂材料
１１絶縁体
１２巻線
１３上金型
１４下金型
１５充填用樹脂注入口
１６成型用樹脂注入口
１７隙間
１８電動機
１９回転軸
２０ハウジング
２１回転子
２２空隙
２３空隙
２４分割固定子鉄心 DESCRIPTION OF SYMBOLS 1 Stator core 2 Iron core piece 2 'Iron core piece 3 Yoke part 4 Teeth part 5 Center part 6 Upper end part 7 Lower end part 8 Through hole 8' Through hole 9 Stator 10 Resin material 11 Insulator 12 Winding 13 Upper mold 14 Lower mold 15 Filling resin inlet 16 Molding resin inlet 17 Gap 18 Electric motor 19 Rotating shaft 20 Housing 21 Rotor 22 Gap 23 Gap 24 Split stator core

Claims

In an armature core made by stacking multiple core pieces,
A central portion formed by laminating the core pieces each having a shape forming a plurality of portions;
An end portion formed by laminating the core pieces having a shape that is in contact with the center portion and lacks a part of the shape of the core pieces constituting the center portion;
An armature core comprising:

The armature core includes a yoke portion and a teeth portion,
The iron core piece constituting the center portion has a shape that forms both the yoke portion and the teeth portion,
The iron core piece constituting the end portion lacks a shape that forms a part that is continuous with the teeth portion, and a part of the yoke portion, and all of the teeth portions.
The armature core according to claim 1, wherein:

The armature core includes a yoke portion and a teeth portion,
The iron core piece constituting the center portion has a shape that forms both the yoke portion and the teeth portion,
The iron core piece that constitutes the end portion has a shape that forms a portion that is continuous with the teeth portion and is a part of the yoke portion, and all of the teeth portions.
The armature core according to claim 1, wherein:

The width of the portion forming the teeth portion of the core piece laminated on the end portion of the armature core is configured to be smaller than the width of the portion of the other core piece of the armature core. ,
The armature core according to claim 2 or 3, characterized in that

A through-hole penetrating the armature core is formed, and the through-hole is filled with a resin material,
The armature core according to any one of claims 1 to 4, wherein the armature core is characterized in that

The insulator is disposed between the winding wound around the armature core and the armature core and electrically insulates both,
The insulator is formed of the same resin as the resin material,
The armature core according to claim 5, wherein

It is a manufacturing method of the armature core according to claim 6,
A laminating step of laminating the iron core pieces;
The laminated iron core pieces are put into a mold, the resin material is injected into the mold, the resin material is filled in the through holes, and the insulator is made of the same resin as the resin material. Filling molding process for molding,
The manufacturing method of the armature core which has this.